Add Pitopn digital shop with FastAPI, Postgres 17, and Docker Compose

Co-authored-by: Cursor <cursoragent@cursor.com>

app/config.py

@@ -0,0 +1,29 @@
+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", extra="ignore")
+
+    app_name: str = "Pitopn"
+    secret_key: str = "dev-secret"
+    debug: bool = False
+
+    postgres_user: str = "pitopn"
+    postgres_password: str = "pitopn"
+    postgres_db: str = "pitopn"
+    postgres_host: str = "localhost"
+    postgres_port: int = 5432
+
+    @property
+    def database_url(self) -> str:
+        return (
+            f"postgresql+psycopg2://{self.postgres_user}:{self.postgres_password}"
+            f"@{self.postgres_host}:{self.postgres_port}/{self.postgres_db}"
+        )
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()